腹腔镜胆囊切除和开腹手术在老年良性胆囊类疾病中的治疗效果比较
복강경담낭절제화개복수술재노년량성담낭류질병중적치료효과비교
The efficacy of laparoscopic cholecystectomy and laparotomy in the treatment of benign gallbladder diseases in elderly patients
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